Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e1653fb94c2a5d…

MALICIOUS

PDF

71.0 KB Created: 2021-09-26 21:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c0e78a5e06f8617d22888b394ec264f8 SHA-1: 6969d734cc77c84491b1c5f468aec78ab0dff925 SHA-256: 34e1653fb94c2a5d91b649af47a8dcf1bb3344b615afbff36ac088ae0ff3da78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The file's structure and the presence of external links indicate it is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=what+should+you+eat+for+breakfast+before+a+workout PDF link annotation
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16139a87f1225a---dupefibosizob.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/winoturer.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497d25b7dce---3987501260.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1963989839613783c58ea0c.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/f6b4ef5a969d678d6988ef4241b96906/jamirikeduduvanimuzube.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/risig.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f361ebc336e2e00997ff5e5e96fe0588/38753631649.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/bufuwetobi.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/waxole.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/kigaxizujebogetoki.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492b12d80bc---75512059203.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/kazixunuwidemanoludubom.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-25/20210925152005676953.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/wojugikesawupisafiledox.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/6a6cea24ee56b838015efd65c20d1d28/35868639472.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/tiwewuwuvixisafopuda.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/93456543191.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e48f1bb856---sijazefapenifojexe.pdfIn PDF document text
    • http://lachina.cn/upload/file/59618427299.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210910163707.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/wawelinalazegupa.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/sikupodilifatagozujeped.pdfIn PDF document text
    • http://bamor.org/userfiles/file/9022534605.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/rutemisewikufusudibagup.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 10780 bytes
SHA-256: 78f09264882f48e987f6b885b99550409aa950f1614a669fab90e4e74a824ddb
font_02_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 16076 bytes
SHA-256: df92c282be22c005e8bd4b924cf4b04634300523cc4a31e75d54570c74a43ce0

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